2do is a simple to-do list manager written in PHP
and using a MySQL database backend. It supports
unlimited numbers of projects, has templated HTML
allowing for complete customisation, and can be
publically viewable by all, or can be protected by passwords. Administration is done via simple Web-based forms.

@Mail Groupware combines the ability to
share address books, calendar items, and
tasks among groups of users with optional
permission levels. It provides a complete Web-
based groupware system for users within
your organization and provides an Outlook
2003/2000 to Web synchronization utility for
Contacts and Calendar data.

A Simple TimeSheet (ASTS) allows a group of
people to record the hours spent working on a
variety of projects. For each project, the hours
can be divided into a number of different
tasks. There are global projects and tasks as
well as personal projects and tasks for each
user.

The SupStar Job Card Management system manages the
workshop jobs, technicians, and other details of a
multi-branch computer sales or technical company.
Its features include per technician reports,
graphs on jobs and queue views, branched total
reports, a calendar for call-out jobs, email and
SMS notification to clients and staff, high
security, and a full admin section.

ARIA is business class management (ERP) software. It lets you manage inventory levels, maintain payroll, and process orders. It is written primarily in PHP and incorporates the ADODB database abstraction layer. There are currently translations for Chinese, Spanish, Italian, and French.

Aakretech TimeTrack lets you easily keep track of
what projects you work on during the day, so you
don't have to remember when writing up your hours
for the week. The program can run in the
background (system tray) and open at specified
intervals for data input.

Achievo is a Web-based project management and tracking tool for small- to medium-sized companies, aiming to become a fully featured ERP-like system in the future. Features include a time registration module, scheduler, project management, todo's, and several statistical tools. Achievo is multi-language, fully customizable, and uses a modular system to allow future extensions.

Active Calendar is a PHP class that generates calendars (month or year
view) as HTML tables (XHTML-Valid). It can produce static calendars
without any links or calendars with a week number column, navigation controls, a date picker
control, event days and content with event URLs, and linkable days (optionally URL
or Javascript). The layout can be configured using CSS, and JavaScript
is not required. The supported dates (on systems using a 32-bit signed
integer Unix time_t) are: 1902-2037 (Unix) and 1971-2037 (Windows), when
using the default PHP native date functions, and 100-3000 and later,
when using the ADOdb Date Library.

Admelix is a live CD distribution based on Ubuntu
Linux with tools for business administration. Its
main objective is to guide managers of small and
medium-size businesses towards GNU/Linux and open
source software. In addition to the live CD, the
project's Web site provides information about open
and free tools for business administration.